85742771 has 2 divisors, whose sum is σ = 85742772. Its totient is φ = 85742770.

The previous prime is 85742749. The next prime is 85742791. The reversal of 85742771 is 17724758.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85742771 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85742791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42871385 + 42871386.

It is an arithmetic number, because the mean of its divisors is an integer number (42871386).

Almost surely, 2^85742771 is an apocalyptic number.

85742771 is a deficient number, since it is larger than the sum of its proper divisors (1).

85742771 is an equidigital number, since it uses as much as digits as its factorization.

85742771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 109760, while the sum is 41.

The square root of 85742771 is about 9259.7392511884. The cubic root of 85742771 is about 440.9599753200.

The spelling of 85742771 in words is "eighty-five million, seven hundred forty-two thousand, seven hundred seventy-one".